<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert title="添加商品信息" type="info" show-icon :closable="false" center></el-alert>
      <!-- 步骤条区域 -->
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTagsLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                expand-trigger="hover"
                :options="cateList"
                :props="cateProps"
                v-model="addForm.goods_cat"
                @change="handleChange"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 上传图片 -->
            <!-- action图片上传后台API请求地址 -->
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="headerSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="addBtn" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="80%">
      <img :src="previewPath" class="previewImg" />
    </el-dialog>
  </div>
</template>
<script>
//导入组件
import _ from "lodash"
export default {
  data() {
    return {
      activeIndex: "0",
      //添加商品的表单数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属的分类数组
        goods_cat: [],
        pics: [],
        goods_introduce: "",
        attrs: [],
      },
      //添加表单的验证对象
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [{ required: true, message: "请选中商品分类" }],
      },
      //商品分类列表
      cateList: [],
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      //动态参数列表数据
      manyTableData: [],
      //静态属性列表数据
      onlyTableData: [],
      //上传图片的路径
      uploadUrl: "http://127.0.0.1:8888/api/private/v1/upload",
      //图片上传组件的请求头对象
      headerObj: {
        //为每一次图片上传提供了一个token验证
        //因为他并没有为upload
        Authorization: window.sessionStorage.getItem("token"),
      },
      //   上传图片的真实路径值
      previewPath: "",
      //预览图片对话框的显示与隐藏
      previewVisible: false,
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories")
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error("获取数据失败")
      }
      this.cateList = res.data
      console.log(res.data)
    },
    //级联选择器  选择性变化
    handleChange() {
      console.log(this.addForm)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        return this.$message.info("请选择三级分类")
      }
    },

    beforeTagsLeave(activeName, oldActiveName) {
      //   console.log("即将进入的标签页：" + activeName)
      //   console.log("即将离开的标签页：" + oldActiveName)
      //   return false
      //阻止标签页跳转
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类")
        return false
      }
    },
    async tabClicked() {
      // console.log(this.activeIndex);
      //证明访问的是动态参数面板
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateID}/attributes`,
          {
            params: { sel: "many" },
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败")
        }
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ")
        })
        this.manyTableData = res.data
        console.log(res.data)
      } else if (this.activeIndex === "2") {
        //证明访问的是静态属性面板
        const { data: res } = await this.$http.get(
          `categories/${this.cateID}/attributes`,
          {
            params: { sel: "only" },
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态属性失败")
        }
        // console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    //处理图片预览事件
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    //处理移除图片的操作
    handleRemove(file) {
      //  1 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2从pics数值中,找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((x) => (x.pic = filePath))
      // 3 调用数组的splice方法,把图片信息对象,从pics数组中移除
      this.addForm.pics.splice(i, 1)
      //   console.log(this.addForm);
    },
    //监听图片上传成功事件
    headerSuccess(response) {
      //   console.log(response)
      //  拼接得到一个图片信息对象
      const picsInfo = { pic: response.data.tmp_path }
      //将图片信息push到pics的数组中
      this.addForm.pics.push(picsInfo)
      //   console.log(this.addForm)
    },
    // 添加商品
    add() {
      // console.log(this.addForm);
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项")
        }
        // 这里无法直接将this.addForm.goods_cat数组转换为字符串
        //级联选择器双向绑定只允许是数组的形式
        // this.addForm.goods_cat=this.addForm.goods_cat.join(',')

        //lodash--cloneDeep(obj)   深拷贝--把一个对象原封不动的复制出一份不破坏源对象
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(",")
        //处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" ")
          }
          this.addForm.attrs.push(newInfo)
        })
        //处理静态属性
        this.onlyTableData.forEach((item) => {
             const newInfo = {
            attr_id: item.attr_id,
            // 静态属性原本的item.attr_vals原本就是字符串
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs=this.addForm.attrs
        // console.log(form)
       const {data:res}=await this.$http.post('goods',form)
       if(res.meta.status!==201){
           return this.$message.error('添加商品失败')
       }
       this.$message.success('添加成功')
    //    通过编程式导航 跳转商品列表页
    this.$router.push('/goods')
      })
    },
  },
  computed: {
    cateID() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 15px 0;
}
.el-steps_title {
  font-size: 10px;
}
.el-checkbox {
  // !important 贴边对齐
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.addBtn {
  margin-top: 15px;
  float: right;
}
</style>